title: Diagnosing zygosity in infant twins: physical similarity, genotyping, and chorionicity.
mesh_terms: D001824:Body Constitution; D002823:Chorion; D004247:DNA / Q000032:analysis; D005260:Female; D005838:Genotype; D006801:Humans; D007223:Infant; D008297:Male; D010920:Placenta; D011795:Surveys and Questionnaires; D013997:Time Factors; D014429:Twins, Dizygotic / Q000235:genetics*; D014430:Twins, Monozygotic / Q000235:genetics*
chemical_list: D004247:DNA